Global Machinery Company PCH25 User Manual

Page 12

11. When ready to start cutting, release the brake, by

pulling the front guard back.

Stopping the chainsaw

1. Release the trigger switch.
2. Set the on/off switch (18) to

Off (the O position).

Checking the oil supply

Run the engine at medium

speed and check that the chain

splatters a thin line of oil which

can be seen on the ground when

the bar is pointed downwards.

This is normal. If there is no

line of chain oil, stop the motor

immediately and investigate the

cause. The oil tank could be

empty or the oil supply to the

chain blocked. This may require

removal of the bar and checking

that the upper oil hole in the bar

is clear of any blockages.

Adjusting the carburettor

The carburettor is factory set and

should not require adjustment.
Changes in operating conditions

may require fine tuning of the

carburettor. Proceed as follows.
1. Stop the engine and screw in

both the H and L needles (15)

using screwdriver (28). Do not

force.

2. Turn the H screw (15) back 3/4 of a turn.
3. Turn the L screw (16) back 1-1/2 turns.

4. Start the engine and let it warm up with the trigger switch

half pulled in. When the engine is warm, release the

trigger switch.

5. Turn the L screw (17) slowly clockwise until the idling

speed is at its maximum then turn the screw back

(anticlockwise) 1/4 of a turn.

6. Turn the idling adjusting screw (T) (14) anticlockwise until

the chain does not turn.

7. If the idling speed is too slow, turn screw (T) clockwise.
8. Make a test cut and adjust screw (15) for best cutting

power, not for maximum speed.

Chain brake

The chain brake operates automatically in the event of

kickback. As the guide bar (1) kicks up, the wrist of the

operator’s hand on the top handle knocks against the front

guard (8) causing the front guard to move forward and

activating the chain brake.
1. The chain brake can be

operated manually by moving

the front guard forward.

2. To release the chain brake,

pull the front guard towards

the top handle until a “click”

is heard.

CAUTION

. Check that the chain

brake is operating correctly each time the chainsaw is used.

Bucking spikes

The Chainsaw has bucking

spikes (6) to assist with cutting

and reduce the chance of

kickback, use them as follows: